<template>
    <div>
        <!--  面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表数据 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                            v-for="(item1, i1) in scope.row.children" :key='item1.id'>
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 嵌套渲染二级权限-->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                                    :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)"> {{
                                            item2.authName }}</el-tag>
                                        <i class=" el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"
                                            closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit"
                            @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete"
                            @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting"
                            @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addFormRole" :rules="addFormRoleRules" ref="addFormRoleRef" label-width="70px">
                <el-form-item label="角色名" prop="roleName">
                    <el-input v-model="addFormRole.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addFormRole.roleDesc"></el-input>
                </el-form-item>
            </el-form>

            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addrole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form :model="editForm" :rules="addFormRoleRules" ref="editFormRef" label-width="70px">
                <el-form-item label="角色名">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            rolelist: [],
            //控制添加角色对话框的显示与隐藏
            addDialogVisible: false,
            //添加角色的表单数据
            addFormRole: {
                roleName: '',
                roleDesc: '',
            },
            //添加表单的验证规则对象
            addFormRoleRules: {
                roleName: [
                    { required: true, message: '请输入角色名', trigger: 'blur' },
                    {
                        min: 3,
                        max: 10,
                        message: '角色名的长度在3~10个字符之间',
                        trigger: 'blur'
                    }
                ],

            },
            //控制修改角色对话框的显示与隐藏
            editDialogVisible: false,
            //查询到的角色信息对象
            editForm: {},
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children',
            },
            //默认选中的节点Id值数组
            defKeys:[105,116],
            //当前即将分配权限的角色id
            roleId:''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        //获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')

            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败!')
            }

            this.rolelist = res.data

            console.log(this.rolelist)
        },
        //监听添加用户对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRoleRef.resetFields()
        },
        //点击按钮，添加新角色
        addrole() {
            this.$refs.addFormRoleRef.validate(async valid => {
                if (!valid) return
                //可以发起添加用户的网络请求
                const { data: res } = await this.$http.post('roles', this.addFormRole)

                if (res.meta.status !== 201) {
                    this.$message.error('添加用户失败!')
                }

                this.$message.success('添加用户成功!')
                //隐藏添加角色的对话框
                this.addDialogVisible = false
                //重新获取角色列表数据
                this.getRolesList()
            })
        },
        //展示修改角色的对话框
        async showEditDialog(id) {
            //console.log(id)
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询用户信息失败!')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        //监听修改用户对话框的关闭事件
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        //修改角色信息并提交
        editRoleInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                //发起修改角色信息的数据请求
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
                    roleName: this.editForm.roleName,
                    roleDesc: this.editForm.roleDesc
                })
                console.log(this.editForm.id)
                console.log(res.meta.status)
                if (res.meta.status !== 200) {
                    return this.$message.error('更新用户信息失败!')
                }
                //关闭对话框
                this.editDialogVisible = false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('更新用户信息成功!')
            })
        },
        //根据Id删除对应的用户信息
        async removeRoleById(id) {
            //弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除改角色，是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            //如果用户确认删除，则返回值为字符串confirm
            //如果用户取消了删除，则返回值为cancel
            //console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }

            const { data: res } = await this.$http.delete('roles/' + id)

            if (res.meta.status !== 200) {
                return this.$message.error('删除角色失败!')
            }
            this.$message.success('删除用户成功!')
            this.getRolesList()
        },
        async removeRightById(role, rightId) {
            //弹框提示是否要进行删除
            const confirmResult = await this.$confirm('此操作将永久删除改权限，是否继续?', '提示',
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }
            ).catch(err => err)

            if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除!')
            }

            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败!')
            }
            // this.getRolesList()
            role.children = res.data
        },
        //展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            const {data:res} = await this.$http.get('rights/tree')

            if(res.meta.status !==200){
                return this.$message.error('获取权限数据失败!')
            }

            //把获取到的权限视剧保存到data钟
            this.rightslist = res.data
            console.log(this.rightslist)
            //获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible=true
        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys 数组中
        getLeafKeys(node,arr){
            //如果当前 node 节点不包含children 属性，则是三级节点
            if(!node.children) {
                return arr.push(node.id)
            }

            node.children.forEach(item =>this.getLeafKeys(item,arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys =[
                this.$refs.treeRef.getCheckedKeys(),
                this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr =keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败!')
            }

            this.$message.success('分配权限成功!')

            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>